Molding machine



Feb, l?) i924,

J." J. PLEESMAN MOLDIN@ MACHINE Filed Nov. s, 1921 2 vSheets-sheet 1 gwwe/Wma feb. 19 1924.

J. J. PLESSMAN MOLDING MACHINE` 2 Sheets-Shet 2 Filed Nov.l8, 1921 *E n.N m. m., m. .m NN. ma o m o... x2 Q LA# wir 3% \d. l H. ,NH .NN @H/ QH@a ma 3 da 3 2 md ma Patented Feb. le, 1924.

OAKLAND, p Jamison, or OAKLAND, centro 1:; ai

JOHN J. rnnssMAN, or

MOLDIN G CHINE.

VApplication Bled November 8, 1921. Serial No. 513,63.

To all 'whom it may concern.:

'Be it known that I, JOHN J. Pressman", a citizen of the kUnited States,residing at Oakland, in the county of Alameda and -State of California,have invented ,cert in new and useful Improvements in Moldi -r,-Machines,

fication. i

My invention is a molding machine, particularlyfuseful for moldin`Window sash wei lits, 'andother chilled cai'castings.,

he invention is particularly directed to a. machine for simultaneously oeratin a plurality of molds in such a way that perect 5 castings may beeadily produced in large numbers.

[Referring to the annexed drawing in which my invention is illustratedand which forms a part of this specification:

Figure 1 is a side elevati n :t my molding` machine'.

igure 2 is an end elevation of my moldin machine. i re 8 is an insidemova le mold members.

Figure 4 is a vertical section of said movable mold member taken on line4-4 of Figure 3.

Figure 5 is a vertical sect-ion taken on line of which the'following isa spec',-

view of one of the 5---5 of Figure 4 showing the coupling" lates forcoupling the movable mold memers to the shaft.

- Figure ,6 is a. side view partly in section .of e modified form of myinvention.

In the drawing -1 and 2 indicate two end standards which are bolted upontwo beams 3 and 4 near the ends of said beams respectively. Eachstandard 1 and 2 is formed ywith an inner vertical Hangs 5 and a hori- 0zontal flange 6 extending outwardly from the upper end of said verticalflange.4 Angle irons 7 and v8 are mounted at their ends on the standards1 and 2, the vertical flange of each of said angle irons restingagainst5 the inside of one horizontal flange vo each of said angle ironsresting: upon one of .the flanges 6 of the standards 1 and 2. 'Thevertical anges -of said angle ironsare bolted by bolts 9 5 to thevertical flanges'` 5 of the standards 1 and 2 and the horizontal flangesof said angle irons being bolted bybolts 10 to the anges 6 of saidstandards. Bearings l1 and 12 are bolted h gf the anges 5 and thebclts13 to the u per partof the standar s l and 2. A shaft 14 yextends4longitudinaliy of the machine throu l1 the bearin 11 and 12 and'bas a15 at one en which engages a thread ipside the bearing 11.. Onthethreaded end of said shaft is secured ,a hand wheel 16 for turningtheshaft The shaft 14 extends throughopenings .molds 18, each of whichmolds lntotwomembers v19 and 20, which members have side horizontaldanges 21 and 22 resti on the horizontal iianges of the angle irons and8.respectively. In each ofthe mold members 19 and 2O is one'half of aplurality of window sashjweight impressions .23 into which the molteniron is poured to mold the sash weights, ing arranged in pairs,communicating at their upper ends with mouths 24 in the top of the'molds onehalf of said mouths being in each mold member. The mold members17 in a plurality of is separated said impressions be- Y v20 arestationary, being secured to the angle irons 7 and 8 by bolts 25extending through the flanges 21 and 22 and the horizontal danges ofsaid angle irons. The'shaft` 14 as a plurality of annular grooves 25',and a pair of plates 26 and 27 provided with notches 28 and 29 arebolted to the outside of each mold member 19 respectively, with saidnotches surrounding said shaft and the edges of said notches resting. insaid grooves, and the notched edges of said plates resting 4adjacenteach other. Upon turning the shaft 14 by' the hand wheel 16, the screw15 causes the mold members 19 to move toward or away from the Imold-members'20-.to close or open1tl1e molds'.

A collar 32 is secured to the shaft 14 adjacent the plates 26 and 27 anda spring 33 is positioned between said collar and platte. The object ofthis construction is to allow for expansion of the mold und of the metalwithin the mold.

In the .modified formbf my invention shown in Fig. 6, the .screw 15 and.hand wheel 16 is replaced by a hydraulic cylinder 35, the piston 36 ofwhich is secured to the shaft 14. .The shaft 14 Vis moved forward orbackward as the pressure is applied to either side of the piston 36.

From the foregoing description it will by bolts 3o and. 31 y.incorporated in this machine,

A. are yieldably Isimultaneously closed, and inposed of connecting eoperable feature makes it'tpossible to thatl particular dividuallyyieldably'held closed. This iii- 7ention therefore includes the manydesirable features of multiple mold casting machine and is so made thatmanyof the parts and complexities have been eliminated which are present1n similar machines known to the art at this time. Its flexibility,simplicity and ability to produce castings rapidare its outstandingfeatures. The'individually yi'eldably and multiple open or close allmolds simultaneously. The ieldable feature is important. In the pouringof the molds one of them may beltille'd, the material may expand-andslightly open mold 'due to the yieldable spring feature without tendingto force open the other molds which are yet to be filled. If thisyieldable feature -is not usedv and a plurality of molds are rigidlyconnected to the operating shaft the filling and cooling of the materialin one mold would tend toslightly open the remaining molds, possiblybefore they could be illed,.andv thus cause waste of metal through -thecracks between the parts of the mo y Havingr described my invention, Iclaim:

l. In a molding machine, a series of molds, each comprising two members,one member of each mold being stationary am the other being movable, ashaft to which the movable member of each mold of said series isindividually yieldablyconnected` and operating means on said shaft formoving it to cause said movable mold members to move against or awayfrom the stationary members to respectively open or close the mold.

In azmolding machine, a mold, comprising two members, a first movableniember and a second member, a third member movable with' respect tosaid second member. a shaft extending through said first Yand secondmembers and connected to said third member to move the saine, a collaron rsaid shaft adjacent said first movable memand means'on said shaftfor causing` ber, said first movable member to move against or away fromsaid second member.

3. In a molding machine a supporting frame, a series of molds mounted intandem on said frame, each of said molds comat least twoparts, one ofwhich .is i'igidl7 attached to said frame and one of whic is movable,and an operating shaft .extending lengthwise of said frame and passingthrough each of said molds, said shaft being yieldably attached to saidmovable mold parts and constituting single means for simultaneouslyadjusting said movable members.

a, In a molding machine, a support, a

movable mold parts,

constituting means to y ,plurality of 4molds mounted lon said sup-lport, and means-for simultaneously yieldably closing said molds andindividually yieldably holding them closed. y

5. In a molding machine, .a support, a plurality of molds mounted onsaid support, and means for simultaneously closing said `molds andindividually yieldably lholding them closed.

6. In a molding machine a supporting frame composed of two. membersspaced apart to form. a track, a series of molds mounted in tandem onsaidtrack, each of said molds composed of two parts, one o said paitsbeing movableA along said track andthe other being rigid with saidtrack,

a shaft extending throiisgh said molds, j0ur' nals attached to saidsupporting frame and.

having said shaft `journaled therein, yieldable means attached to saidshaft and to said said shaft and said yieldable means, simultaneouslyyieldably adjust said mold members with respect to each other.

7. In a'molding machine, angle irons mounted on said standards, abearing mounted on each standard, a shaft extending through saidbearings, a thread n I.. n on said shaft engaging a thread inv one ofsaid bearings, a plurality of molds through which said shaft extends,

each mold comprising a stationary member and a movable member, and meansfor coupling said shaftV to the movable member of said molds so thatsaid movable member lwill be moved against or away from said stationary`members when said shaft is rotated one way or the other. i

8. In a molding machine, a rectangular frame,.means for supporting saidframe a rotatable shaft positioned parallel with the longer members ofsaid frame and journaled midway of the length of the shorter members' ofsaid frame, a plurality of tw'o piece molds supported at their ends inparallel positions and having openings through which said shaft passes,one part of each of said molds being bolted to said longer frame membersand the other part being movable with respect to said tirst partby meansof saidk shaft, means for connecting said shaft to said movablel partconstituting a yielding connecting means allowing the said movable partsto yield under undue pressure, and means Afor rotating said'sliaft, saidlast named means causing the shaft to be moved lengthwise.`

9. The combination as Si characterized by a coil said shafta ringmounted in said groove so as to be engaged on one side by said springand on the other side by one of said movable parts.

10. The combination as expressed claim 8 characterized by a collar onsaid expressed in claim Standards, two

spring, a collar on groove in said shaft, and a flat llO shaft, spacedfrom each of said movable that the notches Will closely fit said groovedparts, a coil spring located around said part of said shaft, all ofthese latter eleshaft and engaging said collar at one end, mentsconstituting the yielding connection 10 the other end of said springtending to eX- above mentioned.

5 ert pressure on one of said movable parts, a .lnv testimony whereof Iaix my signagroove in said shaft and 'two notched ture. plates securedto said movable member so JOHN J. PLESSMAN.

